Pneumatic vehicle-tire.



N0. 697,62l. Patented Apr. I5, [902. E. GREENE.

PNEUMATIC VEHIGLE TIRE.

(Application filed Jan. 4, 1902.)

(No Model.)

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w: Ncmms PETERS co, moraumo" WA$HINGTON, D. c.

UNTTEE STATES PATENT ()FFICE.

EDGEWORTH GREENE, OF MONTOLAIR, NEW JERSEY, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE AMERICAN RUBBER WORKS COMPANY, A COR- PORATION OF NEW JERSEY.

PNEUMATIC VEHICLE-TIRE.

SPECIFICATIGN forming part of Letters Patent No. 697,621, dated April 15, 1902 Application filed January 4, 1902. Serial No. 88,371- (No model.)

T at whom it may concern:

Be it known that I, EDGEWORTH GREENE, a citizen of the United States, residing at Montclair, in the county of Essex and State of New Jersey, have invented a new and useful Improvement in Pneumatic Vehicle-Tires, of which the following is a specification.

This invention relates to pneumatic rubber tires for vehicles, and has for its object to pro- [0 vide a tire that will yield under the wheel-rim Without being cut by the rim edge. It also has for its object to so constructthe body of the tire that its resiliency and resistance to compression Will. be graduated, so as to be alike under various loads, as will be hereinafter explained.

In the accompanying drawings, which form a part of this specification, my invention is fully illustrated with similar letters of refer- 2o ence to indicate corresponding parts, as follows:

Figure 1 represents a transverse section of my improved tire fitted to the Wheel-rim a. Fig. 2 also represents atransverse section showing the tire compressed under a load. Fig. 3 represents a sectional side-elevation, and Fig. 4. represents a transverse section showing the ordinary tire compressed under a load.

The principal feature of this invention is to prevent rim-cutting and at the same time form a lateral thrust-resisting rib on the upper side of the tire which takes effect imme diately under the edge of the rim to prevent 5 rolling out or displacement of the tire. To

accomplish this, a rib c is formed on each side extending entirely around the tire at a position which will bring it in contact with the under side of the rim directly under its edge, as shown in Figs. 1 and 2. The rubber forming the'ribs 0 may be made sufficiently hard to prevent the tire from rolling at all, which is quite desirable on heavy vehicles; but on light carriage-tires to obtain 5 the best results it is preferable to form the ribs 0 of soft yielding rubber that will compress under a load as the tire is compressed, so as to give greater resiliency to the tire and graduate its thrust resistance, as shown in Fig. 4. This feature will be readily appre- 5o ciated when it is considered that in the ordinary method of making the tire to fit the rim the distance of lateral expansion in the side of the tire extends only from the edge of the rim to the center of the tire on the tread side, while a tire provided with my improved lateral thrust-ribs, constructed of soft rubber and leaving a non-contacting space between the ribs and the upper center of thetire on the rim side, creates a distance for lateral expansion in the side of the tire extending from its center at the top or rim side to its center on the tread side, thus leaving the entire side of the tire for a graduated lateral expansion and resiliency instead of one-half the side, as in the usual case, and without its being in danger of rim-cutting from side rim-pressure. Therefore the resiliency and life of the tire are greatly increased.

The lateral thrust-ribs 0 being located on 7c the upper side of the tire directly under the edge of the wheel-rim a will carry a greater part of the load and prevent the edges of the rim from coming in contact with the side of the tire to cut it when compressed, as shown 7 5' in Fig. 2, while with the usual method of making the tire round to fit the rim the greatest pressure is carried on the edge of the rim every time the tire is expanded laterally by tread-pressure, and as this is continuous at the point where the tire carries the load the sides of the tire are being constantly cut, as illustrated in Fig. 4.

Having thus described my invention, what I claim, and desire to secure by Letters Patout of the United States, is, to Wit: I

1. A pneumatic rubber tire provided with lateral thrust-weight-carrying ribs, project ing from its sides, said ribs being located in a position to carry a part of the load and to receive the lateral thrust of the tire directly under the edges of the wheel-rim, leaving a noncontacting space, between the upper side of the said rib and the top center of the tire substantially as described.

2. A pneumatic rubber tire provided with lateral thrust-weight-carryin g ribs, 0, located one on each side of the tire directly under the edge of the wheel-rim leaving a non-conper center of the tire and the two weight-carrying ribs, the latter preventing the edge of the rim from coming in contact with the side of the tire when compressed substantially a described.

In testimony that I claim the foregoing specification I do hereby set my hand this 20 30th day of December, 1901.

EDGEWVORTI'I GREENE.

In presence of- E. G. DUVALL, GEO. II. SANFORD. 

